package com.heima.wemedia.service.impl;

import com.alibaba.fastjson.JSONArray;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.heima.apis.article.IArticleClient;
import com.heima.common.aliyun.GreenImageScan;
import com.heima.common.aliyun.GreenTextScan;
import com.heima.common.tess4j.Tess4jClient;
import com.heima.file.service.FileStorageService;
import com.heima.model.article.dtos.ArticleDto;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.wemedia.pojos.WmChannel;
import com.heima.model.wemedia.pojos.WmNews;
import com.heima.model.wemedia.pojos.WmSensitive;
import com.heima.model.wemedia.pojos.WmUser;
import com.heima.utils.common.SensitiveWordUtil;
import com.heima.wemedia.mapper.WmChannelMapper;
import com.heima.wemedia.mapper.WmNewsMapper;
import com.heima.wemedia.mapper.WmUserMapper;
import com.heima.wemedia.service.WmNewsAutoScanService;
import com.heima.wemedia.service.WmSensitiveService;
import io.seata.spring.annotation.GlobalTransactional;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.util.*;
import java.util.stream.Collectors;

@Service
@Transactional
@Slf4j
public class WmNewsAutoScanServiceImpl implements WmNewsAutoScanService {


    @Autowired
    private WmNewsMapper wmNewsMapper;
    @Autowired
    private Tess4jClient tess4jClient;

    /**
     * 自媒体文章审核
     *
     * @param id 自媒体文章id
     */
    @Override
    @Async //标明当前方法是一个异步方法
    @GlobalTransactional
    public void autoScanWmNews(Integer id) {
        //1.查询自媒体文章
        log.info("通过文章id：{}查询自媒体",id);
        try {
            Thread.sleep(500);
        } catch (InterruptedException e) {
            throw new RuntimeException(e);
        }
        WmNews wmNews = wmNewsMapper.selectById(id);

        if (wmNews == null) {
            throw new RuntimeException("WmNewsAutoScanServiceImpl-文章不存在");
        }
        
        if (wmNews.getStatus().equals(WmNews.Status.SUBMIT.getCode())) {

            //从内容中提取纯文本内容和图片
            Map<String,Object> textAndImages =  handleTextAndImages(wmNews);

            //资管理敏感词过滤
            boolean isSensitive = handleSensitiveScan(((StringBuilder)textAndImages.get("content")).toString(),wmNews);
            if (!isSensitive) return;
            //TODO 阿里云扫描接口不可用，需注释接口扫描
            /*
            //2.审核文本内容 阿里云接口
            boolean isTextScan = handleTextScan((String)textAndImages.get("content"),wmNews);
            if (!isTextScan) return;

            //3.审核图片 阿里云接口
            boolean isImageScan = handleImageScan((List<String>)textAndImages.get("images"),wmNews);
            if (!isImageScan) return;*/

            //4.审核成功，保存app端的相关文章数据
            ResponseResult responseResult = saveAppArticle(wmNews);
            //int i = 10/0;   自定义异常，验证事务回滚
            if (!responseResult.getCode().equals(200)) {
                throw new RuntimeException("WmNewsAutoScanServiceImpl-文章审核，保存app端相关文章数据失败哦");
            }
            //回填article_id
            wmNews.setArticleId((Long)responseResult.getData());
            updateWmNews(wmNews,(short)9,"审核成功");
        }

        
    }

    @Autowired
    private WmSensitiveService sensitiveService;
    /**
     * 自管理的敏感词审核
     * @param content
     * @param wmNews
     * @return
     */
    private boolean handleSensitiveScan(String content, WmNews wmNews) {
        boolean flag = true;
        //获取搜友敏感词数据
        List<WmSensitive> wmSensitiveList = sensitiveService.list(Wrappers.<WmSensitive>lambdaQuery().select(WmSensitive::getSensitives));
        List<String> sensitiveList = wmSensitiveList.stream().map(WmSensitive::getSensitives).collect(Collectors.toList());

        //初始化敏感词库
        SensitiveWordUtil.initMap(sensitiveList);

        //查看文章中是否包含敏感词
        Map<String, Integer> map = SensitiveWordUtil.matchWords(content);
        if (map.size() > 0) {
            updateWmNews(wmNews,(short)2,"当前文章中存在违规内容" + map);
            flag = false;
        }
        return flag;
    }


    @Autowired
    private IArticleClient iArticleClient;
    @Autowired
    private WmChannelMapper wmChannelMapper;
    @Autowired
    private WmUserMapper wmUserMapper;

    /**
     * 保存app端相关的文章数据
     * @param wmNews
     */
    private ResponseResult saveAppArticle(WmNews wmNews) {
        ArticleDto articleDto = new ArticleDto();
        BeanUtils.copyProperties(wmNews,articleDto);

        //文章布局 因名称不同需要单独拷贝
        articleDto.setLayout(wmNews.getType());
        //频道
        WmChannel wmChannel = wmChannelMapper.selectById(wmNews.getChannelId());
        if (wmChannel != null) {
            articleDto.setChannelName(wmChannel.getName());
        }

        //作者
        articleDto.setAuthorId(wmNews.getUserId().longValue());
        WmUser wmUser = wmUserMapper.selectById(wmNews.getUserId());
        if (wmNews != null) {
            articleDto.setAuthorName(wmUser.getName());
        }

        //设置文章id
        if (wmNews.getArticleId() != null){
            articleDto.setId(wmNews.getArticleId());
        }
        articleDto.setCreatedTime(new Date());

        return iArticleClient.saveArticle(articleDto);

    }

    @Autowired
    private FileStorageService fileStorageService;
    @Autowired
    private GreenImageScan greenImageScan;
    /**
     * 审核图片
     * @param images
     * @param wmNews
     * @return
     */
    private boolean handleImageScan(List<String> images, WmNews wmNews) {
        boolean flag = true;
        if (images == null || images.isEmpty()) {
            return flag;
        }

        //下载图片 minIo  和 图片去重
        images = images.stream().distinct().collect(Collectors.toList());
        ArrayList<byte[]> imageList = new ArrayList<>();

        /*images.forEach(image ->{
            imageList.add(fileStorageService.downLoadFile(image));
        });*/
        for (String image : images) {
            byte[] bytes = fileStorageService.downLoadFile(image);

            ByteArrayInputStream inputStream = new ByteArrayInputStream(bytes);
            try {
                //从byte[]转换为butteredImage
                BufferedImage bufferedImage = ImageIO.read(inputStream);
                //识别图片的文字
                String result = tess4jClient.doOCR(bufferedImage);
                //审核是否包含自管理的敏感词
                boolean isSensitive = handleSensitiveScan(result, wmNews);
                if (!isSensitive) return isSensitive;

                imageList.add(bytes);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

        //审核图片
        try {
            Map map = greenImageScan.imageScan(imageList);
            if (map != null) {
                //审核失败
                String scanSuggestion = (String)map.get("suggestion");
                if (scanSuggestion.equals("block")) {
                    flag = false;
                    updateWmNews(wmNews,(short)2,"当前图片中存在违章内容");
                }
                //不确定，需要人工审核
                if(scanSuggestion.equals("review")){
                    flag = false;
                    updateWmNews(wmNews,(short)3,"当前图片存在不确定内容");
                }
            }
        } catch (Exception e) {
            flag = false;
            e.printStackTrace();
        }
        return  flag;
    }

    @Autowired
    private GreenTextScan greenTextScan;
    /**
     * 审核纯文本内容
     * @param content
     * @param wmNews
     * @return
     */
    private boolean handleTextScan(String content, WmNews wmNews) {
        boolean flag = true;
        if ((wmNews.getTitle() + content).length() == 0) {
            return flag;
        }

        try {
            Map map = greenTextScan.greeTextScan(wmNews.getTitle() + "-" + content);
            if (map != null) {
                //审核失败
                String scanSuggestion = (String)map.get("suggestion");
                if (scanSuggestion.equals("block")) {
                    flag = false;
                    updateWmNews(wmNews,(short)2,"当前文章中存在违章内容");
                }
                //不确定，需要人工审核
                if(scanSuggestion.equals("review")){
                    flag = false;
                    updateWmNews(wmNews,(short)3,"当前文章中存在不确定内容");
                }
            }
        } catch (Exception e) {
            flag = false;
            e.printStackTrace();
        } 
        
        return flag;
    }

    /**
     * 修改文章内容
     * @param wmNews
     * @param status
     * @param reason
     */
    private void updateWmNews(WmNews wmNews, short status, String reason) {
        wmNews.setStatus(status);
        wmNews.setReason(reason);
        wmNewsMapper.updateById(wmNews);
    }


    /**
     * 1。从自媒体文章的内容中提取文本和图片
     * 2.提取文章的封面图片
     * @param wmNews
     * @return
     */
    private Map<String, Object> handleTextAndImages(WmNews wmNews) {
        //存储纯文本内容
        StringBuilder stringBuilder = new StringBuilder();
        stringBuilder.append(wmNews.getType());
        ArrayList<String> images = new ArrayList<>();
        
        //1.从自媒体文章内容中提取文本和图片
        if (StringUtils.isNotBlank(wmNews.getContent())) {
            List<Map> maps = JSONArray.parseArray(wmNews.getContent(), Map.class);
            for (Map map : maps) {
                if (map.get("type").equals("text")){
                    stringBuilder.append(map.get("value"));
                }
                if (map.get("type").equals("image")){
                    images.add((String)map.get("value"));
                }
            }
        }
        
        //2.从文章封面中提取图片
        if (StringUtils.isNotEmpty(wmNews.getImages())) {
            String[] imageArray= wmNews.getImages().split(",");
            images.addAll(Arrays.asList(imageArray));
        }

        HashMap<String, Object> resultMap = new HashMap<>();
        resultMap.put("content",stringBuilder);
        resultMap.put("iamges",images);
        return  resultMap;
    }
}




























